Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania

This study analyzed the trends and spatio-temporal variability in rainfall and temperature, and the length of the rainy season (LRS) in the Lake Manyara catchment, Tanzania, covering a period between 1988 and 2018 using stations and satellite climate product. The Mann-Kendall statistical test, Sen&#...

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Autores principales:	Latifa O. Nyembo, Isaac Larbi, Mwemezi J. Rwiza
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	mann-kendall test rain-dependency satellite climate product spatial climate variability standardized precipitation index water balance concept Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/dbb2f23dd85f4886b4e0dc807478aff9
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spelling	oai:doaj.org-article:dbb2f23dd85f4886b4e0dc807478aff92021-11-05T18:31:07ZAnalysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania2040-22442408-935410.2166/wcc.2020.197https://doaj.org/article/dbb2f23dd85f4886b4e0dc807478aff92021-03-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/2/469https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354This study analyzed the trends and spatio-temporal variability in rainfall and temperature, and the length of the rainy season (LRS) in the Lake Manyara catchment, Tanzania, covering a period between 1988 and 2018 using stations and satellite climate product. The Mann-Kendall statistical test, Sen's slope estimator, and inverse distance weighting interpolation techniques were used to detect the trends, magnitude of trends and spatial distribution of rainfall and temperature. A modified Stern's method and water balance concept were used for rainfall onset, cessation and LRS analysis, while a standardized precipitation index (SPI) was used to investigate the wetness or dryness of the area. The results showed high variability and decreasing trend (4 mm/y) in annual rainfall, and non-significant increasing trend for minimum and maximum temperature. Rainfall increased from the western to the northern part of the catchment whereas a reversal pattern was noticed for temperature. The SPI shows a signal of normal condition (about 65%) for all stations – with few years showing evidence of wetter and drier conditions. The LRS showed a decreasing trend indicating a potential negative influence on rain-dependent activities. There is a need, therefore, for adaptation measures such as improving water productivity and irrigation at the farm and catchment level.Latifa O. NyemboIsaac LarbiMwemezi J. RwizaIWA Publishingarticlemann-kendall testrain-dependencysatellite climate productspatial climate variabilitystandardized precipitation indexwater balance conceptEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 2, Pp 469-483 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	mann-kendall test rain-dependency satellite climate product spatial climate variability standardized precipitation index water balance concept Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	mann-kendall test rain-dependency satellite climate product spatial climate variability standardized precipitation index water balance concept Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Latifa O. Nyembo Isaac Larbi Mwemezi J. Rwiza Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
description	This study analyzed the trends and spatio-temporal variability in rainfall and temperature, and the length of the rainy season (LRS) in the Lake Manyara catchment, Tanzania, covering a period between 1988 and 2018 using stations and satellite climate product. The Mann-Kendall statistical test, Sen's slope estimator, and inverse distance weighting interpolation techniques were used to detect the trends, magnitude of trends and spatial distribution of rainfall and temperature. A modified Stern's method and water balance concept were used for rainfall onset, cessation and LRS analysis, while a standardized precipitation index (SPI) was used to investigate the wetness or dryness of the area. The results showed high variability and decreasing trend (4 mm/y) in annual rainfall, and non-significant increasing trend for minimum and maximum temperature. Rainfall increased from the western to the northern part of the catchment whereas a reversal pattern was noticed for temperature. The SPI shows a signal of normal condition (about 65%) for all stations – with few years showing evidence of wetter and drier conditions. The LRS showed a decreasing trend indicating a potential negative influence on rain-dependent activities. There is a need, therefore, for adaptation measures such as improving water productivity and irrigation at the farm and catchment level.
format	article
author	Latifa O. Nyembo Isaac Larbi Mwemezi J. Rwiza
author_facet	Latifa O. Nyembo Isaac Larbi Mwemezi J. Rwiza
author_sort	Latifa O. Nyembo
title	Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
title_short	Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
title_full	Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
title_fullStr	Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
title_full_unstemmed	Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania
title_sort	analysis of spatio-temporal climate variability of a shallow lake catchment in tanzania
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/dbb2f23dd85f4886b4e0dc807478aff9
work_keys_str_mv	AT latifaonyembo analysisofspatiotemporalclimatevariabilityofashallowlakecatchmentintanzania AT isaaclarbi analysisofspatiotemporalclimatevariabilityofashallowlakecatchmentintanzania AT mwemezijrwiza analysisofspatiotemporalclimatevariabilityofashallowlakecatchmentintanzania
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Analysis of spatio-temporal climate variability of a shallow lake catchment in Tanzania

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